Algebra practice question

Answer: 12

Let her age be a: a = 3(a − 8), so a = 3a − 24, 2a = 24, a = 12.

Common wrong answers

If you answered 4

4 is her age 8 years ago.

If you answered 16

16 comes from a = 3(a − 8) solved as 2a = 32 (using 8 × 4).

If you answered 24

24 is 2a, not a.

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